CN102238637A - Method and system for interference prevention - Google Patents
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Abstract
The invention discloses a method for interference prevention. The method comprises the following steps: a source network element transmits inter-cell interference prevention parameters to a target network element; and the target network element performs interference prevention according to the interference prevention parameters. The invention also discloses a system for interference prevention. A parameter transmitting unit in the system is used for transmitting the inter-cell interference prevention parameters from the source network element to the target network element; and an interference prevention unit is used for performing interference prevention according to the interference prevention parameters by the target network element. With the adoption of the method and system disclosed by the invention, precise interference prevention can be realized.
Description
Technical Field
The present invention relates to wireless cellular communication systems, and more particularly, to a method and system for interference prevention.
Background
Interference is an important issue in wireless communication systems. The interference among cells is more prominent under the condition of cell co-frequency deployment, and in addition, the adjacent frequency interference exists among cells under the condition of different frequencies. The interference is specifically solved according to different interference generation scenarios, for example, the downlink interference at the cell edge is typically solved by using a frequency reuse technique. For the macro base station network, the interference influence can be minimized through a common interference solution mode, such as a static interference coordination scheme, an interference randomization technology and a reasonable planning. However, after the concept of Femto cells is introduced along with the development of wireless technology, the complexity of a wireless network is increased due to the introduction of Femto cells, so that the problem of interference is more prominent, and the problem of interference is more troublesome to solve. A home base station is one of Femto cells. The home base station is taken as an example to describe how to solve the interference, wherein the description is applicable to any Femto cell. The femtocell is a small-sized and low-power base station, is deployed in indoor places such as homes, offices and the like, and mainly has the functions of providing higher service rate for users, reducing the cost required by using high-rate services and making up for the defects of coverage of the existing distributed cellular wireless communication system. The home base station has the advantages of material benefit, convenience, low power output, plug and play and the like.
The femtocell user is connected to the core network through the femtocell access network, as shown in fig. 1 and fig. 2, wherein the femtocell access network is composed of a femtocell and a femtocell gateway. For evolved home base station systems, the home base station may be directly connected to the core network without passing through a home base station gateway. The femtocell gateway is responsible for forwarding interaction information between the core network and the femtocell.
Due to the large number of home base stations, the macro cell and other neighboring home base stations cannot be completely divided in frequency, and the home base stations are more under the coverage of the macro cell and only serve a part of users. It can be seen that: introducing the deployment of home base stations increases the interference complexity of the wireless communication system. The interference between cells can be divided into uplink interference and downlink interference.
Interference control is called as interference control, and the interference control can be roughly divided into two types, wherein one type is a solution after the interference occurs; another class is schemes to avoid interference. There are various solutions to interference, such as reducing the transmission power of a cell and reducing the transmission power of a terminal. The scheme for avoiding the interference can minimize the interference to the adjacent cells by adjusting the parameters of the cell and the terminal.
If the interference can be avoided as early as possible, the service quality of the terminal can be improved, and the probability of service interruption is reduced. Therefore, the most important scheme in the interference control is to avoid the occurrence of interference first, preferentially adopt the scheme for avoiding the occurrence of interference, and adopt the interference solution only in the unavoidable scenes. However, in the prior art, since the cell lacks interference prevention parameters for interference prevention of the neighboring cell, accurate interference prevention cannot be achieved. There is a need for an interference prevention implementation scheme that can implement accurate interference prevention.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide an interference prevention method and system, which can achieve accurate interference prevention.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method of interference prevention, the method comprising: the source network element transmits the interference prevention parameters among the cells to the target network element; and the target network element performs interference prevention according to the interference prevention parameters.
When the interference prevention parameter is updated, the method further comprises: updating the updated interference prevention parameters to the target network element.
Wherein, when performing the interference prevention, the method further comprises: and the target network element adjusts the power of the terminal in the cell according to the interference prevention parameter.
Wherein the interference prevention parameter comprises any one or a combination of at least one of the following parameter values:
parameter value 1: a maximum noise figure of a cell or a maximum noise factor of a cell;
parameter value 2: the maximum transmitting power of the terminal allowed by the cell;
parameter value 3: the background noise of the cell;
parameter value 4: the rise-over-noise threshold of the cell.
The maximum noise coefficient of the cell is a coefficient representing noise performance and sensitivity to a receiver; the maximum noise factor of the cell is a factor characterizing noise performance and sensitivity to the receiver.
The background noise of the cell is the total noise received by the cell when no terminal is accessed.
And the noise rise threshold of the cell is the upper limit of the uplink interference noise rise contribution of the terminal to the current cell.
When the interference prevention parameters are transmitted, the method comprises any one of the following transmission modes:
mode 1: communicating interference prevention parameters over an X2 direct interface;
mode 2: communicating interference prevention parameters over an IUR direct interface;
mode 3: communicating interference prevention parameters via an S1 interface;
mode 4: communicating interference prevention parameters over an IUH interface;
mode 5: interference prevention parameters are passed through the IU interface.
A system for interference prevention, the system comprising a parameter transfer unit and an interference prevention unit; wherein,
a parameter transferring unit, configured to transfer, by a source network element, an inter-cell interference prevention parameter to a target network element;
and the interference prevention unit is used for performing interference prevention by the target network element according to the interference prevention parameters.
The system further includes a parameter updating unit, configured to update the updated interference prevention parameter to the target network element when the interference prevention parameter is updated.
The interference prevention unit is further configured to adjust, by the target network element, power of the terminal in the cell according to the interference prevention parameter.
Wherein the parameter transferring unit is further configured to transfer the interference prevention parameter by using a transfer method including any one of the following methods;
mode 1: communicating interference prevention parameters over an X2 direct interface;
mode 2: communicating interference prevention parameters over an IUR direct interface;
mode 3: communicating interference prevention parameters via an S1 interface;
mode 4: communicating interference prevention parameters over an IUH interface;
mode 5: interference prevention parameters are passed through the IU interface.
The source network element transmits interference prevention parameters among cells to a target network element; and the target network element performs interference prevention according to the interference prevention parameters.
By adopting the invention, the targeted interference prevention can be carried out based on the transmitted interference prevention parameters, so that the accurate interference prevention can be realized.
Drawings
Fig. 1 is a network structure diagram of a conventional evolved home base station;
fig. 2 is a network structure diagram of a conventional 3G femtocell;
FIG. 3 is a schematic flow chart of an implementation of embodiment 1 of the present invention;
FIG. 4 is a schematic flow chart of an implementation of embodiment 2 of the present invention;
FIG. 5 is a schematic flow chart of an implementation of embodiment 3 of the present invention;
FIG. 6 is a schematic flow chart of an implementation of embodiment 4 of the present invention;
fig. 7 is a schematic flow chart of implementation of embodiment 5 of the present invention.
Detailed Description
The basic idea of the invention is: the source network element transmits the interference prevention parameters among the cells to the target network element; and the target network element performs interference prevention according to the interference prevention parameters. Here, interference prevention may be considered as one of interference control.
The following describes the embodiments in further detail with reference to the accompanying drawings.
The interference prevention implementation scheme of the invention is a scheme of exchanging interference prevention parameters between cells through an interface between a source network element and a target network element, and the interference prevention parameters between the cells are exchanged to enable the cell to obtain the interference prevention parameters for interference prevention of a neighboring cell, thereby realizing accurate interference prevention.
A method of interference prevention, the method consisting essentially of:
the source network element transmits the interference prevention parameters among the cells to the target network element; and the target network element performs interference prevention according to the interference prevention parameters.
Further: when interference prevention is performed, the method further comprises: and the target network element adjusts the power of the terminal in the cell according to the interference prevention parameter.
Further: the interference prevention parameter comprises any one or a combination of at least one of the following parameter values:
parameter value 1: a maximum noise figure of a cell or a maximum noise factor of a cell;
parameter value 2: the maximum transmitting power of the terminal allowed by the cell;
parameter value 3: the background noise of the cell;
parameter value 4: the rise-over-noise threshold of the cell.
Further: the background noise of the cell is the total noise received by the cell when no terminal is accessed.
Further: the maximum noise coefficient of the cell is a coefficient representing noise performance and sensitivity to a receiver; the maximum noise factor of the cell is a factor characterizing noise performance and sensitivity to the receiver. Here, it should be noted that: the noise figure and the noise factor are two different values, the numerical relationship of which is logarithmic. Since both can be used to identify the sensitivity of the receiver, the representation is functionally the same, but the values of the two parameters are different. The maximum noise figure of a cell is 10 log10 (the maximum noise figure of a cell).
Further: and the noise rise threshold of the cell is the upper limit of the contribution of the terminal to the uplink interference noise rise of the current cell.
Further: when the interference prevention parameter is transmitted, the method comprises any one of the following transmission modes:
mode 1: communicating interference prevention parameters over an X2 direct interface;
mode 2: communicating interference prevention parameters over an IUR direct interface;
mode 3: communicating interference prevention parameters via an S1 interface;
mode 4: communicating interference prevention parameters over an IUH interface;
mode 5: interference prevention parameters are passed through the IU interface.
Further: when the interference prevention parameter is updated, the method further comprises: updating the updated interference prevention parameters to the target network element.
The invention is illustrated below.
Example 1: the present embodiment describes a scheme for preventing interference by transferring interference prevention parameters for interference prevention through a direct interface in an LTE system. For convenience of description, two base stations for information interaction are respectively denoted as eNB1 and eNB2, where Cell1 belongs to one serving Cell of eNB1, and Cell2 belongs to one serving Cell of eNB 2. The base station type described in the embodiments may be an eNB or an HeNB, and the (H) eNB in the drawing indicates that the base station type may be any one of the two base station types. For the case where eNB1 and eNB2 are connected through the home base station gateway and MME, the direct interface may be established with the home base station gateway or with the base station. For the case where the eNB is a macro base station, the direct interface may be an interface between the eNB and the home base station gateway, or an interface between base stations. For establishing an interface to the femtocell gateway, the femtocell gateway is responsible for forwarding information. For simplicity of description, only the interface between enbs is shown in the flow of communicating interference prevention parameters through the direct interface in the LTE system shown in fig. 3. The process comprises the following steps:
step 101: eNB1 sends an X2 setup request message to eNB 2.
Here, the message includes information of Cell1, which includes interference prevention parameters including one or more of the maximum noise figure or noise figure of Cell1, the maximum transmit power allowed by Cell1 for the terminal, the background noise of Cell1, and the rise-over-noise threshold in the message. The background noise is the total noise received by a cell when no terminal is accessed; the maximum noise figure defines the noise performance and the contribution to the receiver sensitivity. The rise-over-noise threshold is an upper limit of the contribution of the terminal to the rise-over-interference noise of the cell. Wherein, the calculation of the uplink interference noise rise contribution can be obtained by Ec/No. Where No is the background noise of the cell and Ec is the signal strength of the terminal arriving at the cell.
Step 102: after receiving the X2 establishment request from eNB1, eNB2 determines whether to establish an X2 direct interface with eNB 1. In a case where it is determined that the X2 interface can be established, the eNB2 transmits an X2 establishment response message to the eNB 1; otherwise eNB2 returns an X2 setup failure message to eNB 1.
Here, in the X2 setup response message, the serving Cell2 information carries the interference prevention parameter of the serving Cell, which is the parameter described in step 101 and is not described in detail herein.
Here, the eNB1 may perform interference prevention in the following manner after obtaining the interference prevention parameters of the neighboring cell. After eNB1 performs measurement configuration on the terminal under Cell1, the terminal performs measurement according to the measurement configuration. The terminal sends a measurement report to the eNB1, including the measurement result of the Cell 2. The eNB1 calculates the strength Ec of the terminal transmission signal reaching the target Cell2 according to the path loss from the terminal under the Cell1 to the Cell2 and the transmission power of the current terminal. And (3) representing the noise rise contribution of the terminal to the target Cell by Ec/No, wherein No represents the background noise of the Cell2, and judging whether the noise contribution of the terminal exceeds a noise rise threshold, wherein the noise rise threshold can be represented by a maximum noise coefficient. When the rise-over-noise contribution exceeds the rise-over-noise threshold, it indicates that the terminal is causing uplink interference to Cell 2. In order to avoid this, the uplink interference should be controlled by reducing the terminal's own transmit power through power control, or informing the Cell2 to raise the threshold of the noise rise coefficient or raise the noise coefficient. In addition, whether the terminal under Cell2 generates uplink interference to Cell1 can be determined according to the maximum transmit power of the terminal allowed by Cell2, so that Cell2 can adjust the maximum transmit power of the terminal to avoid generating uplink interference to Cell 1. The path loss from the terminal to the Cell2 in the Cell1 can be calculated by using the downlink path loss from the Cell2 to the terminal.
In addition, when the interference prevention parameter of the cell changes, the target base station needs to be notified. The updating can be completed by utilizing a base station configuration updating process. In the X2 update procedure, eNB1 sends a base station configuration update message to eNB2, where the message includes information of the newly added cell and the modified serving cell. Wherein the interference prevention parameter is newly added in the serving cell information of the newly added cell and the modified serving cell. The eNB2 receives the base station configuration update request from the eNB1, and determines whether to accept the update. Send a base station configuration update response to eNB1 if the configuration update by eNB1 is accepted, otherwise send a base station configuration update failure to eNB 1. The updated usage is as described above. Wherein the updated interference prevention parameter comprises one or more of the combination of the maximum noise figure of the cell, the maximum transmission power of the terminal, the background noise of the cell and the rise-over-noise threshold.
Example 2: this embodiment describes a scheme that when interference prevention parameters for interference prevention cannot be transferred between base stations through a direct interface in an LTE system, interference prevention is performed by transferring the interference prevention parameters for interference prevention through an S1 interface by means of forwarding of an MME or an HeNB GW. For convenience of description, we denote the two base stations of information interaction as eNB1 and eNB2, respectively, where Cell1 belongs to the serving Cell of eNB1 and Cell2 belongs to the serving Cell of eNB 2. The base station type described in the embodiments may be an eNB or an HeNB, and the (H) eNB in the drawing indicates that the base station type may be any one of the two base station types. Wherein the HeNB may be connected to the MME through the HeNB GW. Wherein HeNBGW is responsible for forwarding information. The process of transferring the interference prevention parameter through the S1 interface as shown in fig. 4 includes the following steps:
step 201: eNB1 sends an eNB configuration transfer message to the MME.
Here, the eNB configuration transmission message includes an identifier of the eNB1, a Tracking Area Identifier (TAI) of the eNB1, an identifier of the Cell1, and an interference prevention parameter for interference prevention of the Cell 1. The interference prevention parameters include: the maximum noise figure or noise factor of Cell1, the maximum terminal transmit power allowed by Cell1, the background noise of Cell1, and the rise-over-noise threshold. The eNB configuration transmission message further includes an identity of eNB2, a TAI of eNB2, and optionally an identity of Cell 2.
Step 202: after receiving the eNB configuration transmission message, the MME performs routing according to the information of eNB2, generates an MME configuration transmission message, and transmits the interference prevention parameter to eNB 2.
Step 203: the eNB2 may communicate the interference prevention parameters for Cell2 to the MME via an eNB configuration transmission message upon receiving the MME configuration transmission message.
Here, the eNB configuration transmission message includes an identifier of eNB2, TAI of eNB2, identifier of Cell2, and interference prevention parameter of Cell 2. The interference prevention parameters include one or more of the maximum noise figure or noise factor of Cell2, the maximum terminal transmit power allowed by Cell2, the background noise of Cell2, and the rise-over-noise threshold. The eNB configuration transmission message further includes an identifier of eNB1, TAI of eNB1, and optionally an identifier of Cell 1.
Step 204: and after receiving the eNB configuration transmission message, the MME performs routing according to the information of the eNB1, generates an MME configuration transmission message and transmits the interference prevention parameter to the eNB 1.
Here, the use of specific interference prevention parameters is as described in embodiment 1 and will not be described here. The interference prevention parameters can be transmitted through the switching process and the newly added interactive message process besides the transmission of the interference prevention parameters by the eNB configuration transmission message and the MME configuration transmission message.
Example 3: this embodiment describes a scheme for interference prevention by transferring interference prevention parameters for interference prevention through an Iur direct interface in UMTS. And after the RNC receives the interference prevention parameters of the adjacent cell, controlling the interference. For convenience of description, we denote the two base stations of information interaction as RNC1 and RNC2, respectively, where Cell1 is under the jurisdiction of RNC1 and Cell2 is under the jurisdiction of RNC 2. Where the ENC1 or RNC2 may be a home base station, which in the case of a home base station is connected to the core network through a home base station gateway. The direct interface may be between home base stations, between home base station gateways, or between the RNC of a macro cell to a home base station gateway. For the direct interface to the femtocell gateway, the femtocell gateway is responsible for forwarding information. For simplicity of description, the procedure of fig. 5 for transferring interference prevention parameters through the core network/HNB GW interface only illustrates the case of RNC and RNC direct interface, and the procedure includes the following steps:
step 301: RNC1 sends a direct information transfer message to RNC2 that contains the Cell identity of Cell1 under RNC1 and the interference prevention parameters for Cell 1. The interference prevention parameter includes one or more of the maximum noise figure of the cell, the maximum transmission power of the terminal, the background noise of the cell, and the rise-over-noise threshold.
Step 302: when the RNC2 receives the direct information transfer message, it acquires the interference prevention parameters of the Cell 1.
Here, the RNC2 may optionally pass the interference prevention parameters of the Cell2 to the RNC1 through a direct information transfer message.
Here, when the RNC2 acquires the interference prevention parameter, the following manner may be adopted when adjusting the maximum transmission power of its terminal for interference prevention:
after the RNC2 performs measurement configuration on the terminal in the Cell2, the terminal in the Cell2 measures the surrounding neighboring cells, and after the measurement and the measurement report of the target Cell1, the RNC2 calculates the strength Ec of the terminal transmitting signal reaching the target Cell1 according to the path loss from the terminal to the target Cell and the transmitting power of the current terminal. And (3) representing the noise contribution by Ec/No, wherein No represents the background noise of the Cell, and judging whether the noise rise contribution of the terminal exceeds the noise rise threshold of the Cell1, wherein the noise rise threshold can also be represented by a maximum noise coefficient. When the rise-over-noise contribution exceeds the rise-over-noise threshold, it indicates that the terminal is causing uplink interference to Cell 1. To avoid this, the terminal should reduce its own transmit power or notify the Cell1 to raise the noise figure, so as to control the uplink interference. In addition, whether the terminal in the target Cell1 generates uplink interference to the Cell2 can be determined according to the maximum transmit power of the terminal allowed by the target Cell1, so that the target Cell can adjust the maximum transmit power of the terminal to avoid generating uplink interference to the Cell 2.
In addition, the updating of the interference prevention parameters can also be completed through a direct information transmission process.
Example 4: the present embodiment describes a scheme for interference prevention in UMTS by communicating interference prevention parameters for interference prevention through a core network or a home base station gateway. And after the RNC receives the interference prevention parameters of the adjacent cell, controlling the interference. The RNC described in the embodiments includes a home base station, among others. For the case of the home base station, the RNC is connected to the core network through the home base station gateway, and the home base station is responsible for forwarding information. The procedure of transferring interference prevention parameters through the core network under UMTS as shown in fig. 6 includes the following steps:
step 401: the RNC1 sends an interference parameter transfer message to the core network.
Here, the interference parameter transfer message includes therein the interference prevention parameter of the Cell 1. The interference prevention parameters include a maximum noise figure, a maximum transmission power of the terminal, and a base noise of the base station. A combination of one or more of the rise-over-noise thresholds.
Step 402: when the core network receives the interference parameter transfer message, it also generates an interference parameter transfer message and transfers the generated interference parameter transfer message to the RNC 2.
Step 403: after receiving the interference parameter transfer message of the core network, the RNC2 may transfer the interference prevention parameters of the RNC2 to the core network through the interference parameter transfer message.
Step 404: the core network generates an interference parameter transfer message to pass the interference prevention parameters to the RNC 1.
The use of specific interference prevention parameters is as described in example 3 and will not be described here.
The message for transmitting the interference prevention parameter may be completed by a relocation procedure and a new interactive message procedure, in addition to the information transmission indication message and the information transmission indication confirmation message.
Example 5: this embodiment describes a scheme for preventing interference by completing an interference prevention parameter for interference prevention by a home base station gateway in a home base station system in UMTS. The same applies to the home base station system under LTE, and the HNB is taken as an example for description. That is, the base station type described in the embodiment may be an HNB or an HeNB, and the (H) eNB in the drawing indicates that the base station type may be any one of the two base station types. The process of transferring interference prevention parameters under the same HNB GW as shown in fig. 7 includes the following steps:
step 501: HNB sends HNB register request message to HNB GW.
Here, the HNB registration request message carries the interference prevention parameter of the HNB. The interference prevention parameter includes one or more of a maximum noise figure, a maximum transmission power of the terminal, a base noise of the base station, and a rise-over-noise threshold.
Step 502: HNB GW sends HNB register acceptance message.
Here, the HNB registration accept message may include information of the neighboring cell determined by the HNB GW, where the information includes interference prevention parameters of the neighboring cell. The interference prevention parameter includes one or more of a maximum noise figure, a maximum transmission power of the terminal, a base noise of the base station, and a noise rise threshold.
In addition, the interactive transmission of the interference prevention parameters can be performed through a newly added HNBAP (Home node barring Protocol) message and a radio access network application part user adaptation (RUA) message. The RANAP refers to a Radio Access Network Application Part, and is denoted as a Radio Access Network Application Part.
For the HNB system, after the HNB obtains the interference prevention parameters, the specific use of the interference prevention parameters is the same as the description of the RNC in embodiment 3 on the use of the parameters, and for the HeNB system, after the HeNB obtains the interference prevention parameters, the specific use of the interference prevention parameters is the same as the description of the HeNB in embodiment 1 on the use of the parameters. And will not be described repeatedly herein.
A system for interference prevention comprises a parameter transferring unit and an interference prevention unit, wherein the parameter transferring unit is used for transferring an interference prevention parameter between cells to a target network element by a source network element. And the interference prevention unit is used for the target network element to perform interference prevention according to the interference prevention parameters.
Here, the system further includes a parameter updating unit, where the parameter updating unit is configured to update the updated interference prevention parameter to the target network element when the interference prevention parameter is updated.
Here, the interference prevention unit is further configured to adjust, by the target network element, the power of the terminal in the cell according to the interference prevention parameter.
Here, the parameter transferring unit is further configured to transfer the interference prevention parameter by using a transfer method including any one of the following methods;
mode 1: communicating interference prevention parameters over an X2 direct interface;
mode 2: communicating interference prevention parameters over an IUR direct interface;
mode 3: communicating interference prevention parameters via an S1 interface;
mode 4: communicating interference prevention parameters over an IUH interface;
mode 5: interference prevention parameters are passed through the IU interface.
Here, the above description is made of chinese and english including characters referred to in the drawings: the mobility management entity is represented by MME; the femtocell Access Network is represented by Home (e) NodeB Access Network, abbreviated as H (e) NB AN; home base stations are denoted by home (e) NodeB, abbreviated h (e) NB; the femtocell Gateway is denoted by home (e) NodeB Gateway, abbreviated as h (e) NB GW; the core network is represented by CN; the maximum Noise figure is expressed in Max Noise figure.
Here, it should be noted that: h (e) NB means: two cases of HeNB and HNB are included, and HeNB is an evolved home base station, while HNB is a 3G home base station. In fig. 1, the home base station is a HeNB, the home base station gateway is a HeNB GW, the home base station management system is a HeMS system, the EPC is a packet core network, and the SeGW is a security gateway. In fig. 2, the HNB is an HNB, the HNB management system is an HMS system, the HNB gateway is an HNB GW, the core network is a core network, the HLR is a location home register, and the AAA server is an authentication, and accounting server.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (12)
1. A method of interference prevention, the method comprising: the source network element transmits the interference prevention parameters among the cells to the target network element; and the target network element performs interference prevention according to the interference prevention parameters.
2. The method of claim 1, wherein when the interference prevention parameter is updated, the method further comprises: updating the updated interference prevention parameters to the target network element.
3. The method of claim 1, wherein the interference prevention is performed, the method further comprising: and the target network element adjusts the power of the terminal in the cell according to the interference prevention parameter.
4. A method according to claim 1, 2 or 3, wherein the interference prevention parameter comprises any one or a combination of at least one of the following parameter values:
parameter value 1: a maximum noise figure of a cell or a maximum noise factor of a cell;
parameter value 2: the maximum transmitting power of the terminal allowed by the cell;
parameter value 3: the background noise of the cell;
parameter value 4: the rise-over-noise threshold of the cell.
5. The method of claim 4, wherein the maximum noise figure of the cell is a figure that characterizes noise performance and sensitivity to a receiver; the maximum noise factor of the cell is a factor characterizing noise performance and sensitivity to the receiver.
6. The method of claim 4, wherein the background noise of the cell is a total noise received by the cell when no terminal is accessed.
7. The method of claim 4, wherein the cell's rise-over-noise threshold is an upper limit of the terminal's contribution to the rise-over-interference noise in the current cell.
8. A method according to claim 1, 2 or 3, wherein the method comprises any one of the following ways of communicating the interference prevention parameter:
mode 1: communicating interference prevention parameters over an X2 direct interface;
mode 2: communicating interference prevention parameters over an IUR direct interface;
mode 3: communicating interference prevention parameters via an S1 interface;
mode 4: communicating interference prevention parameters over an IUH interface;
mode 5: interference prevention parameters are passed through the IU interface.
9. A system for interference prevention, the system comprising a parameter transfer unit and an interference prevention unit; wherein,
a parameter transferring unit, configured to transfer, by a source network element, an inter-cell interference prevention parameter to a target network element;
and the interference prevention unit is used for performing interference prevention by the target network element according to the interference prevention parameters.
10. The system according to claim 9, further comprising a parameter updating unit, configured to update the updated interference prevention parameter to the target network element when the interference prevention parameter is updated.
11. The system of claim 9, wherein the interference prevention unit is further configured to adjust, by the target network element, power of the terminal in the cell according to the interference prevention parameter.
12. The system according to claim 9, 10 or 11, wherein the parameter transferring unit is further configured to transfer the interference prevention parameter by using a transfer method including any one of the following methods;
mode 1: communicating interference prevention parameters over an X2 direct interface;
mode 2: communicating interference prevention parameters over an IUR direct interface;
mode 3: communicating interference prevention parameters via an S1 interface;
mode 4: communicating interference prevention parameters over an IUH interface;
mode 5: interference prevention parameters are passed through the IU interface.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010168410.9A CN102238637B (en) | 2010-05-07 | 2010-05-07 | A kind of method and system disturbing prevention |
| PCT/CN2011/071929 WO2011137694A1 (en) | 2010-05-07 | 2011-03-17 | Method and system for interference prevention |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010168410.9A CN102238637B (en) | 2010-05-07 | 2010-05-07 | A kind of method and system disturbing prevention |
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| CN102238637B CN102238637B (en) | 2016-06-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101523754A (en) * | 2006-10-03 | 2009-09-02 | 高通股份有限公司 | Signal transmission in a wireless communication system |
| CN101657976A (en) * | 2007-04-20 | 2010-02-24 | Lm爱立信电话有限公司 | improving inter-cell interference co-ordination |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101523754A (en) * | 2006-10-03 | 2009-09-02 | 高通股份有限公司 | Signal transmission in a wireless communication system |
| CN101657976A (en) * | 2007-04-20 | 2010-02-24 | Lm爱立信电话有限公司 | improving inter-cell interference co-ordination |
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| Publication number | Publication date |
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| CN102238637B (en) | 2016-06-22 |
| WO2011137694A1 (en) | 2011-11-10 |
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